[Ghost Sentinel - Dual class]

Hi guys  I'm an old player in a new reality and I dont understand everything. I play with Ghost Sentinel.

1. Do different dual classes give my main different bonuses? If yes, what would be the best choice for Ghost Sentinel?

2. Or all dual classes give my main this same set of extra skills after you level it to a certain level and I should just pick up what I like?

[Crippling Dance and Prophecy of might]

Hi guys.

Can Crippling Dance and Prophecy of might be used at the same time? Or they will cancel each other out? I'm thinking about making Iss Dancer in addition to my Hierophant.

Thanks fot the advices